Ppunson Submersible UV Sterilizer for Aquarium, 6W Aquarium UV Light IP68 Waterproof Fish Tank UV Sterilizer Light Submersible Lights US Plug UV lamp with strong effect of sterilization,ultraviolet ray transmitting rate of more than 95%;To provide healthy environment for fish.Apply to fish tank, pool, ponds,etc. Quartz tube & high-quality rubber parts & strong suckers to firmly install ; Waterproof Level: IP68 . Easy to fix with strong suckers ; Firm and Reliable. NOTE: Please DO NOT use this lamp as ordinary lighting, DO NOT expose the fish directly under the UV light for long time, please install and place it in the filter tank or the other place that the light can not leak out. ( Best Lighting Time: 4-5 hours a day, too longer may affect your fishes). Power Plug with on/off switch for conveninent & safety operating. Best to have it on for 5-6 hours in a day. PPUNSON WARRANTY: Promise to respond within 24 hours, 30-day money back or replacement warranty, and lifetime support guarantee.